Kurt Russell and Goldie Hawn are together since 1983 and has a very strong relationship but never decided to marry. Once Goldie stated that the failure of her two previous marriages was a wakeup call for her.
Staying with Kurt has given her a new life and they were living a very happy life as a couple. They have supported each other in every situation being deeply in love. Not getting married is the greatest secret that has kept them attached according to Hawn.